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| import torch | |
| import gradio as gr | |
| from gtts import gTTS | |
| from transformers import pipeline | |
| from transformers import GPT2LMHeadModel, GPT2Tokenizer | |
| css = """ | |
| #input {background-color: #FFCCCB} | |
| """ | |
| # Utility Functions | |
| flatten = lambda l: [item for sublist in l for item in sublist] | |
| def to_data(x): | |
| return x.data.numpy() | |
| def to_var(x): | |
| if not torch.is_tensor(x): | |
| x = torch.Tensor(x) | |
| return x | |
| def clear(): | |
| return None,[],[] | |
| def append(text, history,dialog_hx,personas): | |
| history.append([text,None]) | |
| history , audio,dialog_hx= bot.respond(history,dialog_hx,personas) | |
| return history, audio, None,dialog_hx | |
| class AI_Companion: | |
| """ | |
| Class that Implements AI Companion. | |
| """ | |
| def __init__(self, asr = "openai/whisper-tiny", chatbot = "af1tang/personaGPT"): | |
| """ | |
| Create an Instance of the Companion. | |
| Parameters: | |
| asr: Huggingface ASR Model Card. Default: openai/whisper-tiny | |
| chatbot: Huggingface Conversational Model Card. Default: af1tang/personaGPT | |
| """ | |
| self.device = torch.device('cpu') | |
| self.asr = pipeline("automatic-speech-recognition",model = asr,device= -1 if self.device == "cpu" else 0) | |
| self.model = GPT2LMHeadModel.from_pretrained(chatbot).to(self.device) | |
| self.tokenizer = GPT2Tokenizer.from_pretrained(chatbot) | |
| self.personas=[] | |
| self.sett={ | |
| "do_sample":True, | |
| "top_k":10, | |
| "top_p":0.92, | |
| "max_length":1000, | |
| } | |
| def listen(self, audio, history): | |
| """ | |
| Convert Speech to Text. | |
| Parameters: | |
| audio: Audio Filepath | |
| history: Chat History | |
| Returns: | |
| history : history with recognized text appended | |
| Audio : empty gradio component to clear gradio voice input | |
| """ | |
| text = self.asr(audio)["text"] | |
| history.append([text,None]) | |
| return history , None | |
| def add_fact(self,audio,personas,msg): | |
| ''' | |
| Add fact to Persona. | |
| Takes in Audio, converts it into text and adds it to the facts list. | |
| Parameters: | |
| audio : audio of the spoken fact | |
| ''' | |
| if audio is not None: | |
| text=self.asr(audio) | |
| personas.append(text['text']+self.tokenizer.eos_token) | |
| else: | |
| personas.append(msg+self.tokenizer.eos_token) | |
| return None,personas,None | |
| def respond(self, history,dialog_hx,personas,**kwargs): | |
| """ | |
| Generates Response to User Input. | |
| Parameters: | |
| history: Chat History | |
| Returns: | |
| history: history with response appended | |
| audio: audio of the spoken response | |
| """ | |
| person = self.tokenizer.encode(''.join(['<|p2|>'] + personas + ['<|sep|>'] + ['<|start|>'])) | |
| user_inp= self.tokenizer.encode(history[-1][0]+self.tokenizer.eos_token) | |
| dialog_hx.append(user_inp) | |
| bot_input_ids = to_var([person + flatten(dialog_hx)]).long() | |
| with torch.no_grad(): | |
| full_msg = self.model.generate(bot_input_ids, | |
| repetition_penalty=1.4, | |
| top_k = 10, | |
| top_p = 0.92, | |
| max_new_tokens = 256, | |
| num_beams=2, | |
| pad_token_id = self.tokenizer.eos_token_id) | |
| response = to_data(full_msg.detach()[0])[bot_input_ids.shape[-1]:] | |
| dialog_hx.append(response) | |
| history[-1][1] = self.tokenizer.decode(response, skip_special_tokens=True) | |
| self.speak(history[-1][1]) | |
| return history, "out.mp3",dialog_hx | |
| def talk(self, audio, history,dialog_hx,personas,text): | |
| if audio is not None: | |
| history, _ = self.listen(audio, history) | |
| else: | |
| history.append([text,None]) | |
| history, audio,dialog_hx = self.respond(history,dialog_hx,personas) | |
| return history, None, audio,dialog_hx,None | |
| def speak(self, text): | |
| """ | |
| Speaks the given text using gTTS, | |
| Parameters: | |
| text: text to be spoken | |
| """ | |
| tts = gTTS(text, lang='en') | |
| tts.save('out.mp3') | |
| # Initialize AI Companion | |
| bot = AI_Companion() | |
| personas=[] | |
| for i in ['I\'m a 19 year old girl','I study at IIT Indore','I am an easy-going and fun loving person','I love to swim','I am friendly, nice ,fun and kind','I am studious and get good grades']: | |
| response = i+ bot.tokenizer.eos_token | |
| personas.append(response) | |
| # Create the Interface | |
| with gr.Blocks() as demo: | |
| dialog_hx=gr.State([]) | |
| personas=gr.State(personas) | |
| chatbot = gr.Chatbot([], elem_id = "chatbot").style(height = 300) | |
| audio = gr.Audio(source = "microphone", type = "filepath", label = "Input") | |
| msg = gr.Textbox() | |
| audio1 = gr.Audio(type = "filepath", label = "Output",elem_id="input") | |
| with gr.Row(): | |
| b1 = gr.Button("Submit") | |
| b2 = gr.Button("Clear") | |
| b3= gr.Button("Add Fact") | |
| b1.click(bot.talk, [audio, chatbot,dialog_hx,personas,msg], [chatbot, audio, audio1,dialog_hx,msg]) | |
| msg.submit(append, [msg, chatbot,dialog_hx,personas], [chatbot, audio1, msg,dialog_hx]) | |
| b2.click(clear, [] , [audio,chatbot,dialog_hx]) | |
| b3.click(bot.add_fact, [audio,personas,msg], [audio,personas,msg]) | |
| demo.launch(share=True) | |